Automatic machine



March 9, 1937. F. LINDGREN AUTOMATIC MACHINE Filed Aug. 6, 1935 7Sheets-Sheet l & vg

INVENTOR. FERDINAND L/NDGREN BY W R La -kw ATTORN March 1937. F.LINDGREN AUTOMATIC MACHINE Filed Aug. 6, 1935 7 Sheets-Sheet 2 INVENTOR. FERDINAND L/NDGREN BY W-Q- A TTORNE March 9, 1937. F. LINDGREN2,073,111

AUTOMATIC MACHINE Filed Aug. 6, 1935 7 Sheets-Sheet 3 INVEN TOR.Fseo/mA/o L/NDGEE/V March 9, 1937. F. LINDGREN AUTOMATIC MACHINE FiledAug 6, 1935 7 Sheets-Sheet 4 March 9, 1937. F-. LJNDGREN AUTOMATICMACHINE 7 Sheets-Sheet 5 Filed Aug; 6, 1935 INVENTOR. FERDINAND L/NDGEENBY Niko ATTORNEYX Patented Mar. 9, 1937 UNITED STATES PATENT OFFICEAUTOMATIC MACHINE I Ferdinand Lindgren, Cincinnati, Ohio ApplicationAugust 6, 1935, Serial No. 34,969 26 Claims. (01. 2 8) plurality ofhorizontal and/or vertical tool spin- This invention relates toautomatic machinery, and particularly to multiple spindle machinerygenerally termed automatic drilling and tapping machines, but which areadapted to drill, counter-bore, tap, screw, counter-sink, ream, form,

spot, spin, and perform divers other machining operations.

A number of multiple spindle machines have been proposed in the past,and a number of these 10 have had a considerable commercial success,

however, practically all of these were limited to operating upon onlyone or two sides of the work unless very costly work carriers wereprovided with complicated mechanisms adapted to turn 16 the'work on thework carrier between successive machining stations.

It is an object of the present invention to provide a compact yet highlyefiicient machine adapted to perform various machining operations on twoor more than two sides of the work and even on directly opposite sidesof the work without turning the work on the work carrier.

It is another object oi! the present'invention to provide an automaticmultiple spindle-machine adapted to be quickly tooled for a small numberof machining operations, and for a very large number of operations.

It is a further object of the present invention to provide an automaticmultiple spindle machine which may be easily and quickly changedin setupfor machining diil'erent pieces of work. In the past many machines ofthis type were single purpose machines which necessitated a completefactory rebuilding in order to change over from ing one or all themachining tools.

It is another object to provide a machine adapted to support and driveone or more auxiliary machining tools.

In the accomplishment of these objects various I novel features ofconstruction were developed,

and among these is the provision of a novel' work carrier; a distinctivemechanism for indexing and locking the work carrier; vertical andhorizontal tool heads which are interchangeable 30 and equally operativeon two sides of a work 55 one, two, three, and four-way movement to itdies; and, a number of coadiutant and auxiliary tool spindles radiallyabout the work carrier, and

r a simple cooperating driving mechanism.

Other features and advantages will appear hereinafter.

In the drawings:

Figure 1 is a small-scale general view of the entire machine provided bythe present invention.

Fig. 2 is a longitudinal vertical section of the upper part of themachine.

Fig. 3 is a top view of the machine.

Fig. 4 is a detail of the tool spindle driving means.

Fig. 5 is a horizontal section within the base, toshow the slow speedand reciprocatory main drive shaft, taken on line 5-5 in Fig. 2.

Fig. 6 is a horizontal section within the base, showing the high speedand rotatory main drive shaft, taken. on line 6-6 in Fig. 2.

Fig. 7 is a detail of the indexing mechanism in the fully advancedposition.

Fig. 8 is a fragmentary view of the parts shown in Fig. 7 as viewed fromthe top.

Fig. 9 shows the parts and condition disclosed in Figs. 7 and 8 viewedfrom another side.

Fig. 10 is a view similar to Fig. 7 but shows the parts in the returningcondition.

Fig. 11 is a fragmentary top view of the parts and condition shown inFigl 10.

Fig. 12 is a view similar to Figs. 7 and 10, but shows the feed arm inthe fully returned position.

Fig. 13 is a fragmentary view of the parts and condition shown in Fig.12.

Fig. 14 is a detail view 01 the slow speed and two-way spindle drivemechanism.

Fig. 15 is a modified form of the spindle drive shown in Fig. 14.

Fig. 16 is a detail view of the high speed unidirectional drive for thetool spindles.

I Fig. 17 is a top view of the vertical tool head.

Fig. 18 is a sectional view taken through the .center of the verticaltool head.

Fig. 19 is a rear view of the vertical tool head shown in Figs. 17midi-8:"-

Fig. 20 is an exploded view of the drive spindle mechanism for the toolheads.

Fig. 21 is a top view of the triple tool head auxiliary unit.

Fig. 22 is a rear view of the triple tool head unit shown in Fig. 21. I

Fig. 23 is a rear view or the single tool head auxiliary unit shown inFigs. 20 and 24.

Fig. 24 is a top view of the single tool head unit shown in Fig. 23.

The machine of this invention, in its present preferred embodiment,comprises a base 38 having a substantially hollow, vertical chamber 3|,integral transmission box 32, and a preferably integral table 33rotatably supporting a work carrier 34 to move pieces of work 35 tovarious operative stations on the machine.

Work carrier The work carrier 34 provided by the present invention is ofnovel construction and should be particularly noted, for the same worksupporting table 36 may be arranged to rotate with the work 35 or to bestationary while the work is slid thereover, and with the latterarrangement is adapted to eject or clear the pieces therefrom.

The work carrier 34 comprises an annular index ring 31 provided with anydesired number of index apertures 38 (18 in the present instance)rotatably supported in a channel 31' in the table 33 and having astandard 39 extending upwardly therefrom, either integral therewith or,as shown, made separate and secured thereto by screws 39', with a basesection thereof overlying the apertures 38 and the inner edge of thechannel 31' to prevent chip trouble. Exteriorly of the index ring 31there is provided a stationary ring 40 secured to the table 33 by screws40 and preferably having its base extending over the annular index ring31 to hold the latter in the channel 31' and to prevent chips fromentering the channel. An annular work table 36 overlying the top of thestationary ring 46 and overlying a flange 4| on the standard 39 isprovided with inner and outer sets of holes 42 and 43 respectively toaccommodate one set of screws 44. An annular work locator plate 45overlies the work supporting table 36 and is secured to the standard 39with a set of screws 45' to be rotatable with the index ring 31 andstandard 39, and is provided with a series of pockets 46 (36 in thepresent instance, double the number of index apertures 38) to locatepieces of work 35 properly relative to the tool spindles while'thestandard 39 and work table 36 locate the work in proper. positionvertically.

When the set of screws 44 is passed through the inner set of holes 42and secured to the flange 4| on the rotatable standard 39 the work table36 is rotatable with the locator plate 45 and the work is manuallyloaded and unloaded.

If the same set of screws 44 is passed through the outer set of holes 43and secured to the stationary ring 40, the work locator 45 alone rotatesand slides the pieces of work 35 arcuately thereover. This latterconstruction is advantageous when it is desired to unload the workcarrier 34 automatically. To this end the invention provides removablesection 41 in the work table 36 just short of the loading station topermit the pieces of work 35 to drop downwardly out of the locator 45.into a chute 48, thence into a box or into a work conveyor. Thus, theoperator need only load the work carrier and need not unload it.

If preferred, and as will be understood by persons in the art, the indexring 31, standard 39, work table 36, and locator plate 45 can be madeintegral and notched to receive only one type of work; or may be madeintegral, except for the locator plate 45 and work table 36 which may bemade either separately or integral, and the latter Indexing and lockingIndexing and locking of the work carrier 34 in predetermined arcuate ormachining stations is, in the present preferred form of the invention,accomplished by a feed arm 49 which is at its lower end pivotallymounted on a stud 50 to the base 30, and at its upper end provided witha finger 5| adapted to cooperate with successive index apertures 38 inthe index ring 31 as shown in Figs. 7 and 12 when the feed arm is movedfrom the advanced to the retracted position, and to engage the apertureand index the ring one station to the position shown in Figs. 7 and 8 asthe feed arm is moved into advanced position.

Movement of the feed arm 49 from retracted to advanced position iseffected by a cam 52 on a slow speed shaft 53 engaging with a roller 54on the arm 48 adapted to permit the arm to be pulled into the retractedposition shown in Figs. 12 and 13 by a spring 54' connected to the arm49 and to the 'base 30, as permitted by the low point of the cam and isurged from this retracted position into the advanced position shown inFigs. 7, 8, and9 by the high point of the cam as the latter rotates. Thefinger 5| is secured to a stud 55 and the latter is capable of bothpivotal and reciprocatory movement in bearings 55' on the arm 49. Asviewed in Figs. '7, 10, and 12 it is normally moved ina clockwisedirection by a flat spring 56 and is urged against the side wall 49' byanother flat spring 51. These springs permit the finger 5| to be rotatedin a counter-clockwise direction as the arm swings from the advanced tothe retracted position as shown in Fig. 10 until the top end of thefinger engages the next succeeding aperture, whereupon it snaps into theposition shown in Figs. 12 and 13 while the spring 51 allows the stud 55and finger to be reciprocated toward the other side wall 49' as theengaged aperture moves toward the center of the base in its relationwith the pivot stud 50.

of the arm 49 as will be apparent by viewing Fig. 13 first, then Fig. 8.

Holding and locking the work carrier 34 in advanced position isaccomplished by two mechanisms. A stud 58 backed by a spring 59 andriding on the index ring 31, see Fig. 2, is adapted to frictionally holdthe index ring in advanced position so that the finger 5| as it slidestoward the retracted position, as shown in Fig. 10 will not retract thering. Although it is possible to effect the arcuate step by steprotation of the work carrier by the arm 49 and finger 5| and hold it inadvanced position by the frictional holding stud 58, as just describedin detail, in its preferred form the present invention providesadditional mechanism adapted to positively align and lock the carrier inits successive working stations. This latter mechanism comprises movesagainst the roller 64 and pulls the inter connected plunger 6Idownwardly out of engagement with the associated aperture and out of thepath of travel of the ring 31 when the feed arm 48 and associated finger51 are moved toward or into the retracted position, and during initialmovement of these toward the advanced position.

As the work carrier 34 approaches the next successive station, the lowpoint of the cam 85 moves toward the bottom. of the shaft, and permitsthe spring iii to push the plunger into the aperture 38. Thus, the ringis positively located. Should the feed arm advance the ring slightly toomuch or too little, the plunger automatically takes care of thisdiscrepancy.

It is within the purview of this invention to use notches and other likemediums cut into the index ring; however, in order to improve thewearing qualities, and to make possible the replacement of the wearpoint, it is preferred to provide circular holes with bushings 38" settherein.

Because the feeding mechanism, and the'locking mechanism for the workcarrier are operated by the one drive shaft on which the cams 52 and 65are rigidly'secured in fixed relation, and since both these mechanismsfeed and look through engagement with the same index apertures 38 on thework carrier 34, a novel, positive, and a very effective indexing andlocking is provided by the present invention. I

Tool heads It should be particularly noted that the present inventionprovides, supports, and drives a large variety of tool spindles atvarious arcuate positions both interiorly, exteriorly and above theannular work carrier 34.

Horizontal tool heads 86 (see Figs. 2, 3, 4, 15, and 16) are provided bythe present invention which are equally adaptable for location andoperation inside of the work carrier, for example tool heads A and B, orexteriorly thereof, for example the tool heads C, D, E, and F, and arecapable of imparting one, two, three, and fourway motion to the toolscarried thereby, whether they be interiorly or exteriorly of the workcarrier. Screws 61 engaging threaded holes 61 secure the tool heads tothe table 33 and 33'.

In general the horizontal tool heads 68, best seen in Figs. 2 and 3,each comprises a housing 88 with suitable channels 88 and plates 88'adapted to receive a tongue 18 on tool slides II and to guide the latterin limited reciprocatory movement. As shown, each slide is provided witha pair of hollow tool spindles 12 adapted to receive the tapered shankof desired tools, for example, a tapered shank 13 of the drill chuck I3as shown in Fig. 2. A flange I4 at one end of the spindle, and a longgear 15 at the other end, holds the spindle in the slide. If preferred,these spindles may be yieldingly mounted in any of the usual methods. Aknock-out hole I2 facilitates removal of the tools carried by thespindle. The slide itself provides a satisfactory bearing for rotatablysupporting the tool spindles;

A large gear 18 meshing with the small gears 15 rotates the toolspindles. A tongue and slot connection l1 permits use of the same largegear 18 with pulleys l8 and I8 of the heads A and E, and with gears 88and 8i of the heads B and F respectively as shown in Fig. 20.

Reciprocation of the tool slides II toward and from the work 35transported by the carrier 34 is, as at present preferred, accomplishedthrough the provision of a bell-crank 82, pivoted ona stud 83 extendingbetween the side walls of the housing 68 and having a gear sector 84meshing with 4' operable interiorly and exteriorly of the work carrier;for example, a'tool head G adapted to drill the pieces of work 35 andhead H adapted to tap vertically. Screws 88 engaging threaded holes 88securethe vertical heads to the table 33 and 33' interiorly orexteriorly of the work carrier 34. I n These vertical tool heads 88 intheir present preferred form each includes a main frame 8| having a setof pillars adapted to receive and support a slide 83 for verticalmovement. slide carries a long gear. 84 and through arms 85 adjustablysupports a plurality of vertical tool spindles 86 having gears 86' attheir upper ends and supporting an intermediate gear 81 on fingers 81.The tool spindles 88, gears 88' and 81 are brought into operativerelation with the work and with the long driver gear 84 and are heldthere by lock screws 88.

One-way and two-way rotation of the tool spindles is accomplished by thedrive shaft 88 and bevel gear 88 meshing with a cooperating bevel gearI88 at the lower end of a vertical shaft I88 and through a large gear I8I on this same shaft meshing with the long gear 84 just described.Reciprocation of the spindle carrying slide 93 is, as may be seen bestin Fig. 18, accomplished through a cam I51 moving a connector rod I82vertically ina bearing I83 by a finger I84 secured to the top-endthereof while the latter raises a stud. I85 and the associated slide orallows it to move downwardly. A thread and nut connection I86 provides avertical adjustment for the slide 83.

Driving mechanism The novel driving mechanism provided by the presentinvention, in its presentpreferred form, comprises only one high speedmain drive shaft I88, hereinafter referred to as the rotatory driveshaft, and only one slow speed main drive shaft 53 hereinafter referredto as the reciprocatory drive shaft, adapted to impart one, two, three,and four-way movement to the individual tools, to index and lock thework carrier and to perform divers other operations in a manner about tobe described in detail.

The rotatory drive shaft I88 is supported in the bearings I89, H8, andIII in the'web H2, and side walls 48' and I II respectively of the base38, and in the present form has a large gear I I3 and small gear II4secured at one end, and a small bevel gear II secured at the other endto limit endwise movement, and has a pair of pulleys H8 Theand Ill and abevel gear Il6.secured near the center thereof. An electric motor II6suitably secured to the base, has a gear I meshing with the large gearII3 to impart high speed rotation to the rotatory shaft I06.

One-way movement, (e. g. rotation for drilling) may be imparted to toolspindles internally, externally, and vertically relative to the workcarrier by the one rotatory drive shaft. The internal tool spindles 12on the tool head A are given uni-directional movement through a beltconnection I2I between the pulleys 16and II1, the former beingassociated with and imparting rotation to the gears 16 and 16. By merelyreplacing the pulley 16 with the pulley 16' upon a slightly longer stud(see Fig. 20) the head A may replace the head G externally of the workcarrier as is clearly shown in Fig. 16 wherein a pulley H1 is on theouter end of the shaft I06 and the belt I2I used exteriorly of the base.

The tool spindles 96 on the vertical spindle head G, as shown, arerotated by a belt connection I22 extending between the driving pulleyI23 on the rotatory shaft to the driven pulley I24 on the tool head, thelatter through the shafts and gears previously described impartingunidirectional rotation to the associated tool spindles.

Thus, it will be seen that the one rotatory drive shaft I06 is adaptedto impart a high speed one-way movement to both the horizontal and thevertical tool spindles internally, externally, and vertically above,(viz, on three sides) of the work.

The main drive shaft I06 may also be used to drive a conventional hoppermechanism supported in any suitable manner above the center section ofthe table, for example through a suitable belt connection extending fromthe pulley II6 on the rotatory shaft upward through the central open ngI25 to a pulley on any conventional hopper mechanism.

The reciprocatory drive shaft 63, so called because it is used mostly totranslate rotation into reciprocatory movement, is also supportedsimilarly to the rotatory shaft in bearings I26, I21, and I26, in theweb H2, and side walls 49' and 51. This-rec procatory shaft supports anumber of gears and cams which may be best described individually. Atthe left side, as viewed in Fig. 2, it is provided with a large gear I29meshing with a small gear I I4 on the rotatory shaft I 06 in order to bedriven by the latter at a considerably reduced ratio.

Two-way rotation of the spindles 12 and 66 in the horizontal andvertical tool heads 66 and 63 respectively, both internally andexternally of the work carrier 34 is accomplished directly from the onereciprocatory drive shaft 63 with several novel forms of mechanismprovided by the present invention. One form applied to a horizontal toolhead 66, but equally applicable with the vertical head 60,'is shown inFig. 15. It comprises a rocker member I30 pivoted on a stud I 3| with apitman connection I32 on a rod I33 at its lower end including a bearingblock I34 carried by a driver block I36 on the outer end of thereciprocatory shaft 63. A chain I36 meshing with a sprocket I31 on thetool head is secured to the rocker member I30 with a clamp plate I33 andspring connection I36. As the shaft 63 rotates the driver block movesfrom the solid line to the dot-and-dash line position shown in Fig. 15to oscillate the rocker member and to rotate the sprocket I31, and theassociated gear 16.v gears 16 and spindles 12 in right hand and lefthand direction of rotation. The chain provides a very silent drive.

A similar but more economical two-way drive mechanism is shown in Fig.14, (applied in Figs. 2, 3, i7, 18, and 19) which includes the samepitman connection I 32 but provides a modified rocker member I30 with anintegral or attached gear segment I40 adapted to mesh with gears, forexample gears 60, 6|, and I, to drive associated spindles 12 and 66.

The tool spindles 12 carried by the internally located tool head B aregiven two-way rotation through the provision of a driving connection I42including a rack I43 meshing with a small gear 60 on the stud 60' whilea block I44 also pivoted on the stud forms a reciprocatory bearing forthe rack and maintains it in peripheral spaced relation to the gear thuspermitting the entire rack to be oscillated slightly about the stud. Atits lower end the rack is connected to a fork I46 having an elongatedslot I46 riding vertically on the shaft 63 and having a roller I41riding on a cam I46 carried by the reciprocatory shaft. As the highpoint of the cam is rotated toward the top of the machine it worksagainst the roller and raises the rack vertically relative to the gear60 and thereby imparts one-way rotation to the spindles 12 through thegear 16 and associated gears 16 and 60. And as the cam moves toward thebottom of the machine, a roller I46 aflixed to the lower end of the forkis pushed downwardly and thereby causes the rack through the gears tomove the associated tool spindles in the other direction. This entiretype of two-way spindle driver may be used with equal facility on theexterior of the machine (for example, to drive the externally locatedhorizontal tool head D or the vertical tool head H) and may be used onthe vertical tool head when the latter is placed within the work carrierring without change either to the two-way driver or to the tool head.

Two-way reciprocation of the horizontally disposed tool slides H andassociated spindles 12 in the tool heads 66, for example the internallylocated tool head B, is accomplished by a connector I60 secured to thearm 66 on the bell crank 62 including a forked plate I 6| embracing thereciprocatory shaft 63 and with a roller I62 resting upon a cam I53. Aroller I64, or some equivalent means, may be used to pull the connectorI60 down and associated slides 1I back. The cam I63 moves the forkedplate I6I vertically up and down through-a limited range of movement,and imparts arcuate movement to the bell crank and reciprocatorymovement to the tool spindle slide. The same cam, forked plate, andconnection I63, I6I, and I60 may be located between the bearings I26 andI23 and may be used to drive a horizontal tool spindle head 66exteriorly of the work carrier, for example if the tool head B wasplaced on the table in the location of the present vertical tool head G,the same connector I60 except for an offset forked arm I6I' may be usedfor the head A.

Plain two-way reciprocatory movement for the horizontally disposed toolspindles 12 is sometimes desirable; for example. when it is desired tohave fingers on the tool spindles 12 move in onto a piece of worktransported by the work carrier 34 to perform some light formingoperation or, for example, to overlie the piece of work 36 in thecarrier 34 to prevent it from being pulled out by the tools carried Mthe Vertical tool head as the latter are pulled from the work, and forvarious other like reasons. In such uses it is merely necessary to placeand tighten a set screw I55 to prevent the spindles from turning and insuch cases, of course, no rotatory driving connection is made.

Three-way movement of the horizontal spindles is accomplished by merelykeeping the simple rotatory driving connection I2I or I22 or by keepinga similar slow speed one-way rotatory driving connection with the shaft53 in combination with the reciprocatory driving connections just described. Four-way movement to the horizontal tool spindles isaccomplished through the provision of the reciprocatory drivingconnections just described in combination with the two-way rotatorydrive of the rack I43 type, of the gear segment I40 type, or of thechain I36 type hereinbefore described.

Similar one, two, three, and four-way movement of the vertical toolspindles 96 internally and externally of the work carrier 34 isaccomplished by the provision of a very similar connector I02 extendingfrom the finger I04 to a forked plate I56 and to a cam I51 carried bythe reciprocatory shaft and having a roller I58 engaging the cam I51.The vertical tool spindles may be locked against rotation by tighteningset screws I59 thereagainst when it is desired to have plain two-wayreciprocatory movement, of the tool spindles. Three-way movement isaccomplished by combining the one-way rotatory drive,

between pulleys I24 and I25 with the reciprocatory drive. Four-waymovement is accomplished by combining any of the two-way rotatory driveshereinbefore described in detail with the'recipro catory drive justdescribed.

The motor I I9 connected to any suitable source of power with a switchin the usualmanner is adapted to drive the rotatory shaft at a highspeed through the gear I20 on the armature shaft engaging the gear I I3n the rotatory shaft and the latter through a small gear H4 and largegear I29 drives the reciprocatory shaft 53 at a slow speed; thus thereis a coordinate driving relation between the rotatory drive shaft I08and the reciprocatory drive shaft 53 in which high speed rotation of thetool spindles and reciprocation of the spindles, and indexing andlocking of the work carrier 34, is accomplished in timed relation. Also,by connecting the pulley I24 to the reciprocatory shaft rather than therotatory shaft, and shortening the belt connection I22, the spindles maybe driven in one direction at a slow speed rotation.

The reciprocatory driving shaft 53 of the present invention thusprovides a simpleyet highly efficient single means adapted to impartslow speed rotation to the tool spindles; two-way rotation to the toolspindles; impart two-way plain reciprocatory movement to the tools;impart both reciprocatory and slow speed rotatory movement; and toimpart reciprocatory and two-way rotatory movement, to horizontal toolspindles interiorly and exteriorly and vertical tool spindles verticallyrelative to the work carrier.

This same shaft, and a pulley I60 thereon, may be used to drive an oilpump I6I through a belt I 6|, as shown. Further, the same pulley, or asimilar one,may be placed on the shaft between the bevel gear I62 andcollar I63 in order to drive a belt through the opening I25 extending toa hopper feed or like mechanism supported on the center section of thetable 33,

Coadiutaat tools The present invention provides a novel arrangement inwhich additional tools are provided in closerelationshlp to the maindrive shafts 53 and I08 and the tool head G. In the present preferredembodiment this novel arrangement comprises shaping the transmission box32 so that the table extension 33 thereon extends arcuately on either orboth sides of the main shafts to provide a support for either or boththe horizontal and/or vertical tool heads 66 and 89. As shown in Fig. 3particularly, the extension supports the two horizontal heads C and Dfor drilling and tapping respectively, but the vertical head 89 arrangedto drill or tap may be used with equal facility at either station.

To this end the transmission box is provided with a set of bosses I65(see Fig. 6) supporting intermediate gears I66 on studs I61 and otherbosses I68 and I69 supporting coadjutant rotatory driveshafts I andgears I93 thereon, with extensions I10 adapted to receive drivingpulleys similar to the pulley I23.

Higher in the same transmission box between bosses HI and I12 in theside wall III and cross web N2, the present invention provides a pair ofcoadjutant reciprocatory drive shafts I13 having beveled gears I14 onthe inner ends thereof meshing with a main bevel gear I on the mainreciprocatory drive shaft, to be rotated coordinately therewith, andhaving projections I13 extending on the outer ends thereof to receivedriving pulleys or to receive the driver block I35 for the two-wayrotatory drive. With this type of drive the shafts I13 rotate adiflerent hand than the main drive shaft 53. ,If preferred the shaft maybe built up like the coadjutant rotatory drive shafts I10 withintermediate gears to provide like direction of rotation between themain and coadiutant reciprocatory shafts 53 and The projections I10 onthe coadiutant rotatory shafts I10 may be provided with a pulley I23 andthereby impart high speed rotation to the spindles 12 of the heads C andD or an equivalent head, and the projections I13 on the coadjutantreciprocatory shafts may be provided with pulleys or crank-arms toimpart slow speed rotationor two-way rotation to the tool headsoverlying these stations. The table 33' (see Fig. 3) underlying theheads C and D, for example, is provided with apertures similar to theopenings I64 to clear the bearing I03 of the vertical tool head 89 andthe connector I50 of the vertical tool heads 66 so that thereciprocatory drives already described in connection wlththe horizontaland-vertical tool heads may be Connected to the coadjutant shafts I13be'tw, th'e bosses m and m. Preferably th 'shjaits laresprovided' withthe usual 1m cam during the initial assembly of the machine so that itis merely necessary to drop the forked finger down onto the shaft, aswill be readily appreciated by anyone familiar with machineconstruction.

Thus, the present invention provides a plurality of coadiutant supportsand driving mechanisms to make possible aplurality of coadjutant toolheads in group association with the main driving mechanism.

Auxiliary tools quent and complementary machining operations on thepieces of work transported by the work carrier 88. One of theseauxiliary tools is best shown in Figs. 2, 3, 1'1, through 20, 23, and24, and comprises what may best be termed single auxiliary transmissionbox I18 having a main frame I11 supporting an auxiliary rotatory shaftI18, auxiliaryreciprocatory shaft I18 adapted through tongue and slotconnections I80 and I8I to mesh with intermediate rotatory andreciprocatory shafts I82 and, I88. Bolts I88 entering holes I84 inflanges I85 serve to connect the box I 18 or the like to the main base88 of the machine. The intermediate shafts I82 and I88 through bevelgears I88 and I81 thereon, and cooperating bevel gears H8 and I82 on themain shafts I88 and 53 are adapted to impart rotation to theintermediate auxiliary shafts I82 and I88.

when this auxiliary transmission box is secured to the frame, either thehorizontal or the vertical tool heads 88 or 88 may be secured to the topthereof, shafts I18 and I18 associated with shafts I82 and I88 arecapable of imparting one, two, three, and four-way movement to thespindles carried thereby in exactly the same manner as has already beendescribed in connection with the main and coadjutant machiningstations.-

Interiorly of the box I18 the shaft I18 is provided with the previouslydescribed lift cam and is provided with a cutout previously described,or I88, (Fig. 24) to make possible the reciprocatory drive to the toolhead. A cover plate I11 on the bottom facilitates assembly within thebox and keeps the oil and grease therein.

0n the side of the machine opposite the main transmission box 82 thereis shown a triple station auxiliary transmission box I88 including aframe I88 adapted to be secured to the flanges I88 with screws I88. Ingeneral it embraces the principles of the main transmission box 82 andthe auxiliary transmission box I18 last described, differing only in theprovision of a removable three station table I88 thereon adapted toreceive three tool heads 88 and/or 88 and in the provision of aself-contained driving mechanism for the three tool heads. This tripleauxiliary transmission box may best be seen in Figs. 1 through 6, 21 and22. This box is provided with central bearings I8I and I82 adapted toreceive the auxiliary rotatory and reciprocatory shafts I18 and I18,like those in the single auxiliary unit I18 with the same tongue andslot connections I80 and III adapted to engage with and be driven by themain rotatory and reciprocatory drive shafts I88 and 58. Further, thebox is provided with holes I8I' to receive the crank stud I8I of any ofthe three forms of two-way driving mechanisms hereinbefore described,and provided with a top center opening I88 adapted to clear the bearingI88 or the connector I50 of the reciprocatory drive mechanisms for thetool slides. The pulley I28 on the end of the intermediate rotatoryshaft I18 may be used to impart unidirectional high speed rotation tothe tool spindles if preferred.

The auxiliary transmission box I 88 (Figs. 21

and 22 particularly) also provides secondary bearings HI and I12 adaptedto support auxbearings I88 and I88 and also bosses I adapted to receiveand support an exact duplicate of the coadjutan't rotatory gears I83 andshafts I10 and intermediate gears I88 respectively, best seen in Fig. 6.It includes secondary holes I84 in the top table section thereof toprovide clearance for the bearing I08 and connector I50 of the toolslide reciprocating mechanisms. The shafts I18 and I18 may be providedwith the lift cams and associated mechanism as already described. Thevarious parts are preferably assembled within the box through an open-,ing I85 in the bottom thereof. Afterwards the box is sealed with aplate I88 which, in effect, transforms the box into a grease or oiltight compartment in which the various parts may run.

This same triple auxiliary unit may be secured to the flanges I85opposite the loading station as shown by the dot and dash lines I81 inplace of the single unit. It will be apparent to anyone skilled in theart that a double u'nit, rather than the single or triple auxiliary unitmay be made. It is also within the purview of this invention to have thetransmission boxes I18 and I88 or two of the boxes made integral withthe base 88 so that the machine is also provided with a large number ofradiating tool stations exteriorly of the work carrier.

However, the auxiliary units and the method of interchangeabilityprovided by the structure of the present invention represents a muchmore advantageous structure since it is possible to considerably clearthe spaces around the machine and to cut down the working load on themotor. In addition to the foregoing it is also possible to add specialmachining tools radically different from the tool heads hereinbeforedescribed onto the machine and still have good support and a drivingmechanism therefor.

Adjustment of the reciprocatory drive of the various vertical andhorizontal tool heads 88 and 88 is accomplished by thread and lock nutconnections I88 on each. A door I88 on the side of the base 88facilitates adjustment, repair, and assembly of parts within the base.

Operation The motor H8 is started whereupon the shafts I88 and 58 aredriven and the latter through the cams 82 and 85 oscillates the indexarm 48 and reciprocates the plunger 8| to effect a step by step arcuatemovement of the work carrier 88 to the various machining stations. Theoperator loads pieces of work into the carrier to the right of the chute48. As the pieces of work are indexed to the station adjacent the headC, the drills 200 carried thereby, rotated and reciprocated by themechanism hereinbefore described, are moved in to drill holes 20I in thepieces of work; in the next station the drills 288 carried by the head Aare rotated and reciprocated to drill holes 208 in the pieces of work.

In the next station the taps 285 are reciprocated and given two-wayrotation to rough tap the external holes 20I. In this and in thepreceding station the vertical spindles 86 are rotated and reciprocatedto move drills 288 down into the pieces of work and form vertical holes201 in the work. When the pieces of work are adjacent the tool head H,the taps 208 are reciprocated and rotated to tap the vertical holes 201,and when adjacent the head E the drills 288 are moved in to counter-sinkthe holes 28I. When the work is adjacent thehead F the taps 2I8 aregiven movement to finish tap the holes 2!. In this same station the taps2H are given movement to thread the holes 204 internally relative to thework carrier. As the work carrier moves the work above the chute 48 thepieces drop by gravity downward into chute 48 if the work table 38 issecured to the stationary ring 40 and the section 41 is removedtherefrom. When the section 41 is not removed, and when the table 38rotates with the locator plate 45, the pieces of work are removedmanually.

During these machining operations the main rotatory and reciprocatorydrive shafts index and lock the work carrier in a step by step mannerand also impart the rotatory and reciprocatory movements to thehorizontal and vertical tool spindles I2 and 96 carried by the toolheads A, B, and G in exact timed relation relative to each other. At thesame time the main drive shafts 83 and I08 through the coadiutant driveshafts I13 and H8 impart three-way and four-way movement to the toolspindles I2 in the tool heads C and D in exact timed relation with themovement of the work carrier and the tool heads A, B, and G.

Because the tool heads H, E, and F supported by the auxiliarytransmission boxes, I16 and I88 have a mechanical connection with themain drive shafts Hi8 and 53 through the tongue and slot connections I88and IN, these heads are also driven in exact timed relation with thework carrier 34 and the tool heads A,- B, C, D, and G. It will beappreciated readily that with the structures of this invention variousother combinations of tools or machining operations may be mad".

It is within the purview of this invention to make the various types andthe variously conditioned and located tool heads, and also thecoadjutant and auxiliary supports and driving mechanisms, hereinbeforedescribed in detail, integral with or substantially integral with themain base 30 although this represents a much less advantageous machinebecause it would in effect make but a singlepurpose machine and one ofthe greatest and most important advantages of the preferred and shownembodiment is that it is widely interchangeable and that the machineitself can be greatly reduced in size in certain set-ups to facilitateworking around it.

Also it will be understood readily that the tool heads 66 and 89 may bereciprocated by expedients other than the cams shown, and may each beprovided with but a single tool spindle I2 and 96 respectively or onlyone of each of .the two spindles in the individual tool heads providedwith tools in which event the number of work carrying pockets 46 willequal the index amrtures 38. Thus, the machine in general ashereinbefore described may be used to fabricate large or very widepieces of work.

Other variations and modifications may be made within the scope ofthepresent invention. and portions of the improvements may be used withoutothers.

I claim:

1. In a device of the character described, the combination with a base,of an annular work carrier; tool spindles interiorly, and exteriorly ofsaid annular work carrier; at least one high speed drive shaft extendingradially from the vertical center of the base and work carrier; at leastone slow speed drive shaft extending radially from the vertical centerof the base and work carrier; and means associated with said high and 7low speed drive shafts adapted to impart one and reciprocatory movementand also one and twoway rotation to said tool spindles interiorly,exteriorly and above said annular work carrier.

3. In a device of the character described, the combination with a base,of an annular work carrier; tool spindles interiorly, and exteriorly ofsaid annular work carrier; spindle driving connections and only two maindrive shafts adapted to impart one and two way rotation and to impartreciprocatory movement to said tool spindles.

4. In a device of the character described, the combination with a base,of an annular work carrier; tool spindles interiorly, exteriorly, and

above said annular work carriehsplridl driving connections and only twomain'drive shafts associated with said driving connection adapted toimpart reciprocatory movement andalso one and two way rotation to saidtool spindles interiorly, exteriorly and above said annular workcarrier.

5. In a device of the character described, the

combination with a base, of an annular work carrier; three motion toolspindles supported by said base interiorly and exteriorly of said workvcarrier; at least one high speed drive shaft extending radially from thevertical centerof the base and work carrier; at least one slow "speeddrive shaft extending radially from the vertical center of the base andwork carrier; and means associated with said high and low speed driveshafts adapted to impart three motion operation to said interior andexterior tool spindles.

6. In a device of the character described, the combination with a base,of an annular work carrier; four motion tool spindles supported by saidbase interiorly and exteriorly of said work carrier; at least one highspeed drive shaft extending radially from the vertical center of thebase and work carrier; at least one slow speed drive shaft extendingradially from the vertical center of the' asev and work carrier;andrneans associat said; l,high; ;and low "speed drive seda te -i j tosaid interior. and exterior i001]- 7. In aQdevice/o th characterdescribed, the ase; ofa1 g'rotatable. work combination wit carrier;radially arranged too spindles; a high speed main drive shaft; auxiliarydrive shafts associated with said main drive shaft-and-radiatingtherefrom; and driving connections between said radial tool spindles.and said radiating auxiliary shafts.

8. In a device of the character described, the

combination with a base; of a rotatable work carrier; radially arrangedtool spindles; a speed main drive shaft; .9, slow speed main driveshaft; auxiliary drive shafts associated with said high and slow speedmain drive shafts and radiating therefrom; and driving connectionsbetween said tool spindles and said radiating auxiliary shafts adaptedto impart rotatory and reciprocatory movement to said tool spindles.

9. In a machine of the character described, the combination .with abase; of a rotatable work carrier; a tool spindle; indexing mechanism; apair of main drive shafts; and means on said pair of drive shaftsadapted to coordinately operate the indexing mechanism and to impartthree-way movement to the tool spindle.

10. In a machine of the character described, the combination with abase; of a rotatable work carrier; a tool spindle; indexing mechanism; apair of drive shafts; and means on said pair of drive shafts adapted tocoordinately operate the indexing mechanism and to impart four-waymovement to the tool spindle.

11. A machine of the character described; having in combination with abase; an annular work carrier; indexing mechanism; internal and externalradial tool spindles; a pair of main drive shafts; and means on saidpair of drive shafts adapted to operate the indexing mechanism and toimpart three-and/or four-way motion to the tool spindles.

12. In a machine of the character described, the combination with a basehaving a plurality of arcuately arranged work stations; of a rotatablework carrier; tool spindles; means for indexing the work carrier; asingle driving means adapted to concurrently operate the tool spindlesand the indexing means; and heads adapted to support the tool spindlesfor rotatory and reciprocatory movement, said heads being adapted to bemounted at various arcuate work stations adiacent the rotatable workcarrier, and in operative relation to the driving means.

13. In a machine of the character described, the combination with a basehaving a plurality of arcuately arranged work stations, of an annularwork carrier, rotatably supported upon the base; tool spindles; drivingmeans; heads adapted to support the tool spindles for rotatory andreciprocatory movement, said heads being adapted to be mounted atvarious arcuate work stations exteriorly and/or interiorly about theannular work carrier and in operative relation to the driving means.

14. In a machine of the character described,

. the combination of a base having a table-like top; an annular workcarrier rotatably supported upon the base; and tool spindle headsadapted to support the tool spindles for rotatory and 'reciprocatorymovement, said heads being adapted to be mounted upon a table-like topexteriorly and/or interiorly of the annular work carrier and at variousarcuate work stations about the rotatable work carrier.

15. In a device of the character described, the combination with a base,of a plurality of tool spindles; a rotatable indexing ring; a standardon said indexing ring, a stationary ring; a work table secured to saidstationary ring; and a work locator on said standard, overlying saidtable, and rotatable with the support on the indexing ring, and capableof sliding work located thereby over said table.

16. In a device of the character described, the combination with a base,of a rotatable indexing ring; a standard on said indexing ring; astationary ring; a table on said stationary ring, having a gap therein;a work locator on the standard, and rotatable therewith; and a chuteunderlying said gap, allowing work to drop from the locator and table asthe locator moves the work across the table into a position over the88p.

17. In a device of the character described, the con tfiination with abase, of a rotatable indexing ring; a. standard on said indexing ringand rotat-- able therewith; a stationary ring; a work locator on saidstandard and rotatable therewith; and a work table underlying saidlocator capable of securement to the stationary ring so that work ismoved over the top thereof during rotation of the locator and capable ofsecurement to said standard for rotation with the latter, and with thelocator.

18. In a machine of the character described, the combination with abase, of a rotatable work carrier, having a plurality of aperturestherein; an arcuately movable arm pivotally connected to a support;means adapted to arcuately move the arm; and an arcuately movable fingeron said arm, adapted to engage in successive apertures of the workcarrier and rotate the latter when the arm is arcuately moved in onedirection and adapted to move clear of the engaged aperture and acrossthe under side of the work carrier into a next succeeding aperture whenthe arm is moved in the other direction.

19. In a machine of the character described,

the combination with a base, of a rotatable work carrier, having aplurality of apertures therein; a movable member; mechanism forautomatically moving said member; and a finger on said member adapted toengage successive apertures in the work carrier and to arcuately movethe carrier when the member is moved in one direction and adapted tomoveclear of the engaged aperture and into a succeeding aperture whenthe member is moved in the other direction.

20. In a machine of the character described, the combination with abase, of a rotatable work carrier, having a plurality of aperturestherein; a movable member; mechanism for automatically moving saidmember; a finger on said member adapted to engage successive aperturesin the work carrier and to arcuately move the carrier when the member ismoved in one direction and adapted to move clear of the engaged apertureand into a succeeding aperture when the member is moved in the otherdirection; and means adapted to support said finger for arcuatory andreciprocatory movement in the movable arm.

21. In a machine of the character described, having in combination witha base, of a rotatable work carrier; tool spindles; a feed dog adaptedto arcuately advance the work carrier; a latch adapted to lock the workcarrier in successive arcuate stations; means adapted to reciprocate thetool spindles; and a main drive shaft adapted to operate the feed dog,latch, and the tool spindle reciprocating means in timed relation.

22. In a machine of the character described, the combination with adisposed base; of a rotatable work carrier; internal radial toolspindles; external radial tool spindles; vertical tool spindles; a feeddog adapted to arcuately advance the work carrier; a latch adapted tolock the work carrier in successive radial stations; means adapted toreciprocate the internal, external, and vertical tool spindles; and amain drive shaft adapted to operate the feed dog, latch and the toolspindle reciprocating means in timed relation.

23. In a machine of the character described, the combination of a base;a rotatable work carrier having apertures therein; a feed dog engagingsaid apertures adapted to arcuately advance the work carrier; a plungerunderlying the work carrier and engaging said apertures; and'a maindrive shaft adapted to operate the feed dog and plunger in timedrelation.

24. In a machine of the character described, the combination of a base;a horizontally dispa sed drive shaft; a cam on said drive shaft; a toolhead on said base; a tool spindle; a tool spindie slide on said head;bell crank associated with the tool spindle slide; and a connectorextending from the bell crank to the cam on the horizontally disposeddrive shaft adapted to reciprocate the tool spindle slide.

25. In a machine of the character described, the combination of a base;tool spindles; a main support; a main drive mechanism providing a directdrive to tool heads on the main support; a coadjutant main support; anda coadjutant driving mechanism, associated with the main drivemechanism, adapted to drive the tool spindles on the coadjutant mainsupport.

26. In a machine of the character described, the combination of a base;tool spindles; a. main support; a main drive mechanism; an auxiliarysupport; and an auxiliary driving mechanism in the auxiliary support,associated with said main driving mechanism, adapted to drive toolspindles on said auxiliary support.

FERDINAND LINDGREN.

